Manufacture of swivel members



4 s. w; PARSONS.

MANUFACTURE OF SWIVEL MEMBERS.

' APPLICATION FR ED-OCT- 2811919.

Patented July 25, 1922.

WITNESSES:

INVENTOR. Jlaar! W Parse/i5 BY I fi ATTORNEY.-

UNITED STATS TENT OFFICE.

STUART W. PARSONS, OF NEW BRITAIN, CONNECTICUT, ASSIGNOR TO THE STANLEYWORKS, OF NEW BRITAIN, CONNECTICUT,'A CORPORATION OF CONNECTICUT.

MANUFACTURE OF SWIVEL MEMBERS.

Specification of Letters Patent.

Patented July 25, 1922.

Application filed October 28, 1919. Serial No. 333,950.

To all whom it may concern:

Be it known that I, STUART W. PARSONS, a citizen of the United States,and a resident of New Britain, county of Hartford, State of Connecticut,have invented certain new and useful Improvements in the Manufacture ofSwivel Members, of which the following is a specification.

It is the object of the present invention to provide an improved methodof manufacture whereby swivel members for hasp fasteners, strong anddurable in character, may be economically made.

Briefly speaking, my improved method consists in first punching from aflat piece of sheet metal, preferably wrought iron, a blank having aring and a post extending therefrom, then rounding the edges of theblank by pressing it between suitable dies, and then reducing thediameter of one end of the post to form a pintle.

In the accompanying drawing Fig. l is a view of a piece of sheet metalillustrating the steps takenin cutting swivel blanks therefrom.

Fig. 2 is a view of a blank.

Fig. 3 is a view of the blank after it has been shaped.

Fig. at is a view of the finished swivel member, and

Fig. 5 is a view of the swivel member attached to a plate, the latterbeing in section.

In carrying out my improved method, a fiat sheet of metal 10 is fedthrough a punch press having a set of dies to stamp out slugs leavingopenings 11, and a second set of dies to punch out swivel blanks 12having a closed ring 12 and a post 12 The sheet of metal from which theblanks are cut is preferably of wrought iron as it is sufiicientlymalleable to permit shaping and at the same time a swivel member formedtherefrom has great tensile strength.

After the blank is punched out, it is placed between two dies havingcounterpart grooves of the same configuration as the blank except thatthey are curved in cross section. The dies are forced with considerablepressure against the blank so as parts thereof substantially circular incross section.

The next operation consists in reducin as by swaging, the diameter ofthe end of the post 12 to provide a pintle 12 and a shoulder 12 In Fig.5, I hav shown the finished swivel member pivoted to a plate 13, thepintle 12 being rotatably fitted in an opening in the plate and the endof the pintle being headed as at 12 It will be seen that by proceedingin accordance With the present invention, the manufacture of the swivelmember requires but relatively few operations and each of theseoperations may be quickly and simply carried out. The swivel memberbeing formed of wrought metal is extremely strong and this is especiallytrue since the ring thereof is continuous or unbroken.

I claim as my invention The improved method of manufacturing swivelmembers for hasp fasteners which consists in punching from a flat sheetof metal a blank having an unbroken ring and an integral post extendingtherefrom, then by suitable dies simultaneously shaping the ring and thepost so that the blank is substan tially circular in cross section andof uniform diameter in all parts, and then reducing one end of the postto thus form a pintle.

STUART W. PARSONS.

to make all

